John Satterfield:
Anybody planning to homebrew a rig for the "new" 630 meter band? A qrp CW rig, tube type would be cool. Suggestions?

Dale R. Parfitt:
It appears that Elecraft is going to be able to do a firmware upgrade to allows us K3 owners on the band with only a PA needed.JUMA also has a 630M transverter.

Dale W4OP

Dale Hunt:
There are a number of designs for European 136kHz rigs that would give a goodstarting point. While those with a good supply of tube parts can probably usethose, switching MOSFETs are an excellent choice at this low of a frequency.

MARTIN MARRIS:
On the receiver end of things: not actually homebrew, but the 630m (472-479 kHz) band is squarely within the tuning range of the BC-453. Makes sense, since that WWII receiver was a navigational set for radio beacons. However I'm not sure it would be much use for hams trying out the new band. It would only be a single-conversion super, right? I just checked my own BC-453 and the 7-kHz spread of the new band is only about half of one turn of the little tuning knob. Still, when I get my "yet to be restored" BC-453 up and running, I look forward to seeing whether it is any use for copying the intrepid early users of the band.

73 from Martin, KB1WSY

martin wendell:
With a power limit of 1 watt (or 5 watts depending on geography) an RF signal generator feeding a magnetic loop antenna tuned with a variable cap could be considered. My old Heathkit puts out about 20 MW and I haven't even looked at peaking it.If it was kept under 100MW and the antenna and feedline were kept under ten feet would it be legal for experimentation under Part 15, pre-allocation? Tnx ~ M